Inventor · disambiguated record
Frederick L. T. Tsang
Also filed as: HOFF MARCIAN E JR · TSANG FREDERICK · TSANG FREDERICK L T · TSANG FREDERICK LAM-TAK
11 granted patents·247 citations·filing 1975–1999
91Inventor score
Top patents by PatentIndex Score
11 records- 0193US4250570ARedundant memory circuitINTEL CORP·Filed 1978·Granted Feb 10, 1981·102 cites·12 claims
- 0282USD350373SHousing for an electronic instructional game apparatusVTECH IND INC·Filed 1992·Granted Sep 6, 1994·28 cites·1 claims
- 0371US5362272AActivity toy and walker deviceVTECH IND INC·Filed 1993·Granted Nov 8, 1994·34 cites·12 claims
- 0470USD358421SElectronic educational activity toyVTECH IND INC·Filed 1993·Granted May 16, 1995·15 cites·1 claims
- 0569US4002931AIntegrated circuit bipolar bootstrap driverINTEL CORP·Filed 1975·Granted Jan 11, 1977·14 cites·14 claims
- 0666USD353566SWalkerVIDEO TECH INDUSTRIES INC·Filed 1993·Granted Dec 20, 1994·13 cites·1 claims
- 0764USD413149SElectronic learning aid housingCHAN SANNIE L S·Filed 1997·Granted Aug 24, 1999·18 cites·1 claims
- 0864USD407748SElectronic educational game housingVTECH IND LLC·Filed 1996·Granted Apr 6, 1999·16 cites·1 claims
- 0938US3936813ABipolar memory cell employing inverted transistors and pinched base resistorsINTEL CORP·Filed 1975·Granted Feb 3, 1976·4 cites·11 claims
- 1028USD360224SHousing for an electronic instructional game apparatusVTECH IND INC·Filed 1992·Granted Jul 11, 1995·1 cites·1 claims
- 1126USD422033SElectronic learning aid housingVTECH ELECTRONICS LTD·Filed 1999·Granted Mar 28, 2000·2 cites·1 claims
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